Dancing with the Stars: Meet the Season 18 Cast!

Danica McKellar

How You Know Her: McKellar, 39, gained fame as a child actress playing Winnie Cooper on The Wonder Years, but now is known for writing math books aimed at middle school and high school girls. She also had a recurring role as Elsie Snuffin on The West Wing in the early 2000s.
Partner: Valentin Chmerkovskiy